[dev-util] Make cros_workon_make handle .tested file appropriately

Apparently, a new portage added a .tested flag file after src_test is successfully run.

make cros_workon_make remove this file when the user asks for --test

BUG=None
TEST=use cros_workon_make with --test, but no --reconf (which masks this issue)

Change-Id: I50cb80d99e0e4e8283cdfe250100486c101f4bcb
Reviewed-on: http://gerrit.chromium.org/gerrit/1572
Reviewed-by: Daniel Erat <derat@chromium.org>
Tested-by: Chris Masone <cmasone@chromium.org>
1 file changed